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BOSTON MARATHON 2025

Nathan Brosey

MA

Bib: 26624 M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
9:53/mi
30:42
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
9:25/mi
59:58
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
9:18/mi
1:28:52
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
9:22/mi
1:57:59
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
9:23/mi
2:04:23
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
10:31/mi
2:29:52
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
10:44/mi
3:03:12
↑ 181↓ 1480.2%
138 ft elev
20M
11:28/mi
3:18:47
↑ 64↓ 500.2%
148 ft elev
21M
15:46/mi
3:34:33
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
13:25/mi
3:44:35
↑ 17↓ 861.7%
156 ft elev
23M
11:28/mi
3:58:56
↑ 23↓ 630.6%
116 ft elev
24M
12:17/mi
4:11:13
↓ 821.3%
34 ft elev
40K· 24.85 mi
13:27/mi
4:22:43
↓ 200.3%
20 ft elev
25.2M
14:21/mi
4:27:40
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
11:39/mi
4:39:32
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:04:23
Pace9:29 /mi
2nd Half
Distance13.11 mi
Time2:35:09
Pace11:50 /mi
📊Positive Split: 24.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:0930:429:5330:42
9:53
-
10K
6.21 mi12:16:2559:589:3929:16
9:25
-0:28
15K
9.32 mi12:45:191:28:529:3228:54
9:18
-0:07
20K
12.43 mi13:14:261:57:599:3029:07
9:22
+0:04
Half
13.11 mi13:20:502:04:239:296:24
9:23
+0:01
25K
15.53 mi13:46:192:29:529:3925:29
10:31
+1:08
30K
18.64 mi14:19:393:03:129:5033:20
10:44
+0:13
20M
20.00 mi14:35:143:18:479:5615:35
11:28
+0:44
21M
21.00 mi14:51:003:34:3310:1315:46
15:46
+4:18
35K
21.75 mi15:01:023:44:3510:2010:02
13:25
-2:21
23M
23.00 mi15:15:233:58:5610:2314:21
11:28
-1:57
24M
24.00 mi15:27:404:11:1310:2812:17
12:17
+0:49
40K
24.85 mi15:39:104:22:4310:3411:30
13:27
+1:10
25.2M
25.20 mi15:44:074:27:4010:374:57
14:21
+0:54
Finish
26.22 mi15:55:594:39:3210:4011:52
11:39
-2:42

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

9:18 /mi

Average Pace

10:40 /mi

Slowest Pace

15:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:04:23

44% of race

Time at Steady Pace

1:52:54

40% of race

Time at Slower Pace

42:15

15% of race

Average Pace: 10:40 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:47:0930:429:5330:42
9:53
#25300
10K
6.21 mi12:16:2559:589:3929:16
9:25
#24606
15K
9.32 mi12:45:191:28:529:3228:54
9:18
#24122
20K
12.43 mi13:14:261:57:599:3029:07
9:22
#23735
Half
13.11 mi13:20:502:04:239:296:24
9:23
#23709
25K
15.53 mi13:46:192:29:529:3925:29
10:31
#23835
30K
18.64 mi14:19:393:03:129:5033:20
10:44
#23751
20M
20.00 mi14:35:143:18:479:5615:35
11:28
#23849
21M
21.00 mi14:51:003:34:3310:1315:46
15:46
#24272
35K
21.75 mi15:01:023:44:3510:2010:02
13:25
#24468
23M
23.00 mi15:15:233:58:5610:2314:21
11:28
#24465
24M
24.00 mi15:27:404:11:1310:2812:17
12:17
#24561
40K
24.85 mi15:39:104:22:4310:3411:30
13:27
#24682
25.2M
25.20 mi15:44:074:27:4010:374:57
14:21
#24723
Finish
26.22 mi15:55:594:39:3210:4011:52
11:39
#24812
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi25300148621486223216(Top 82%)13940(Top 87%)13940(Top 620%)
10K6.21 mi3.10 mi24606+69414534+32814534+32823883(Top 84%)14208(Top 88%)14208(Top 632%)
15K9.32 mi3.11 mi24122+48414320+21414320+21423216(Top 82%)13940(Top 87%)13940(Top 620%)
20K12.43 mi3.11 mi23735+38714133+18714133+18722485(Top 79%)13573(Top 84%)13573(Top 604%)
Half13.11 mi0.68 mi23709+2614119+1414119+1423201(Top 82%)13892(Top 86%)13892(Top 618%)
25K15.53 mi2.42 mi23835-12614168-4914168-4924395(Top 86%)14376(Top 89%)14376(Top 640%)
30K18.64 mi3.11 mi23751+8414089+7914089+7923459(Top 83%)13814(Top 86%)13814(Top 615%)
20M20.00 mi1.36 mi23849-9814120-3114120-3124484(Top 86%)14206(Top 88%)14206(Top 632%)
21M21.00 mi1.00 mi24272-42314295-17514295-17527691(Top 97%)15717(Top 98%)15717(Top 699%)
35K21.75 mi0.75 mi24468-19614379-8414379-8427305(Top 96%)15490(Top 96%)15490(Top 689%)
23M23.00 mi1.25 mi24465+314360+1914360+1924184(Top 85%)13931(Top 87%)13931(Top 620%)
24M24.00 mi1.00 mi24561-9614392-3214392-3226026(Top 92%)14819(Top 92%)14819(Top 660%)
40K24.85 mi0.85 mi24682-12114433-4114433-4126724(Top 94%)15148(Top 94%)15148(Top 674%)
25.2M25.20 mi0.35 mi24723-4114445-1214445-1226610(Top 94%)15067(Top 94%)15067(Top 671%)
Finish26.22 mi1.02 mi24812-8914479-3414479-3426356(Top 93%)14967(Top 93%)14967(Top 666%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21story building
+97ft-345ft

Overall

23216

Males

13940

M40-44

13940

5K→10K

3.1 - 6.2 mi

Top 84%
×5story building
+79ft-138ft

Overall

23883

Males

14208

M40-44

14208

10K→15K

6.2 - 9.3 mi

Top 82%
×3story building
+67ft-78ft

Overall

23216

Males

13940

M40-44

13940

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

22485

Males

13573

M40-44

13573

20K→Half

12.4 - 13.1 mi

Top 82%
×2story building
+19ft-37ft

Overall

23201

Males

13892

M40-44

13892

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

24395

Males

14376

M40-44

14376

25K→30K

15.5 - 18.6 mi

Top 83%
×9story building
+181ft-148ft

Overall

23459

Males

13814

M40-44

13814

30K→20M

18.6 - 20.0 mi

Top 86%
×5story building
+64ft-50ft

Overall

24484

Males

14206

M40-44

14206

20M→21M

20.0 - 21.0 mi

Top 97%
×8story building
+106ft-24ft

Overall

27691

Males

15717

M40-44

15717

21M→35K

21.0 - 21.8 mi

Top 96%
×7story building
+17ft-86ft

Overall

27305

Males

15490

M40-44

15490

35K→23M

21.8 - 23.0 mi

Top 85%
×5story building
+23ft-63ft

Overall

24184

Males

13931

M40-44

13931

23M→24M

23.0 - 24.0 mi

Top 92%
×6story building
+12ft-82ft

Overall

26026

Males

14819

M40-44

14819

24M→40K

24.0 - 24.9 mi

Top 94%
×1story
+6ft-20ft

Overall

26724

Males

15148

M40-44

15148

40K→25.2M

24.9 - 25.2 mi

Top 94%
×1story
+13ft-16ft

Overall

26610

Males

15067

M40-44

15067

25.2M→Finish

25.2 - 26.2 mi

Top 93%
×2story building
+22ft-21ft

Overall

26356

Males

14967

M40-44

14967

Passing Analysis

Category:
Athletes Passed
2087
Passed By
1599
Net Change
+488
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25300
5K → 10K71117+694#25300#24606
10K → 15K49612+484#24606#24122
15K → 20K3969+387#24122#23735
20K → Half3610+26#23735#23709
Half → 25K78204-126#23709#23835
25K → 30K197113+84#23835#23751
30K → 20M48146-98#23751#23849
20M → 21M6429-423#23849#24272
21M → 35K6202-196#24272#24468
35K → 23M6461+3#24468#24465
23M → 24M23119-96#24465#24561
24M → 40K7128-121#24561#24682
40K → 25.2M243-41#24682#24723
25.2M → Finish17106-89#24723#24812
TOTALS20871599+488
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing